standalone dashboard questions
Posted: Wed Jul 19, 2017 2:38 am
Hello,
I installed one GEM (WiFi) with 2 Spilt 200 CT and 19 M50 for all sub-circuits. (see attached fig0.jpg). In the same local network, I installed one desktop and standalone dashboard (XAMPP) to collect data. I have several questions regarding the stand alone dashboard software.
1. For 5 days minutes data, I've noticed a few missing data (fig1.png). Do you have any opinions why it happened? When I saw the data, the "kwh" is large after missing period, so I suspected there was a problem in standalone dashboard. However, in the manual, it is written that the GEM sends cumulative "wattseconds", so the missing part might be attributed to the WiFi connection loss. Another thought is that I joined the local desktop via Teamviewer software, so my frequent use of local desktop may distract XAMPP server (the desktop computer is not very good).
2. In the fig0, I am monitoring all circuits. However, when I looked at the collected data on mysql database, there is slight difference between the sum of all circuits and main circuit electricity (fig2png, red line is sum of all circuits, green line is main circuit electricity). I used wattsecond data because there might be truncation error in kwh data. In the graph, the red line looks higher than green line, but it is not always. In the graph, the red line is 3-5% higher than green line. The sum of "wattseconds" is very similar for the 5 days. (By the way, I calculated differentials of wattsecond) Do you have any ideas why it happened?
(a) sensor uncertainty (but it looks like there is a certain pattern)
(b) some power loss between main circuit and sub-circuits
(c) measurement error: power is instantaneous and measurement is discrete. There will be inevitable measurement error.
3. How the wattsecond is calculated?
I know wattsecond is cumulative value (and I made the graph by calculating the delta increases).
I am not sure how the GEM calculates the wattsecond. Since power is continuous data, so there will be some uncaptured power usage in GEM. Am I right?
4. Standalone dash board on AWS (Amazon cloud).
Currently, the GEM sends data to local desktop (something like 192.168.0.18:80). Can I use public IP address instead of the local network? In other words, is it possible to send packet directly to the AWS instance which has public ip address (and XAMPP is installed in the AWS instance).
Sorry for many questions and my little knowledge on this issue.
I appreciate your answer.!
Thanks
I installed one GEM (WiFi) with 2 Spilt 200 CT and 19 M50 for all sub-circuits. (see attached fig0.jpg). In the same local network, I installed one desktop and standalone dashboard (XAMPP) to collect data. I have several questions regarding the stand alone dashboard software.
1. For 5 days minutes data, I've noticed a few missing data (fig1.png). Do you have any opinions why it happened? When I saw the data, the "kwh" is large after missing period, so I suspected there was a problem in standalone dashboard. However, in the manual, it is written that the GEM sends cumulative "wattseconds", so the missing part might be attributed to the WiFi connection loss. Another thought is that I joined the local desktop via Teamviewer software, so my frequent use of local desktop may distract XAMPP server (the desktop computer is not very good).
2. In the fig0, I am monitoring all circuits. However, when I looked at the collected data on mysql database, there is slight difference between the sum of all circuits and main circuit electricity (fig2png, red line is sum of all circuits, green line is main circuit electricity). I used wattsecond data because there might be truncation error in kwh data. In the graph, the red line looks higher than green line, but it is not always. In the graph, the red line is 3-5% higher than green line. The sum of "wattseconds" is very similar for the 5 days. (By the way, I calculated differentials of wattsecond) Do you have any ideas why it happened?
(a) sensor uncertainty (but it looks like there is a certain pattern)
(b) some power loss between main circuit and sub-circuits
(c) measurement error: power is instantaneous and measurement is discrete. There will be inevitable measurement error.
3. How the wattsecond is calculated?
I know wattsecond is cumulative value (and I made the graph by calculating the delta increases).
I am not sure how the GEM calculates the wattsecond. Since power is continuous data, so there will be some uncaptured power usage in GEM. Am I right?
4. Standalone dash board on AWS (Amazon cloud).
Currently, the GEM sends data to local desktop (something like 192.168.0.18:80). Can I use public IP address instead of the local network? In other words, is it possible to send packet directly to the AWS instance which has public ip address (and XAMPP is installed in the AWS instance).
Sorry for many questions and my little knowledge on this issue.
I appreciate your answer.!
Thanks